Question

town. If the po
15. A and B are two towers. The height of tower A is 20% less than that of B. How much per cent is
B's height more than that of A?
16. In an examination, 30% of the candidates failed in English, 35% failed in G.K. and 27% failed
in both the subjects. If 310 candidates passed in both, how many candidates appeared in the​

Answer 1

Answer:

Answer:

The height of B is 25% more than A.

Step-by-step explanation:

It is given that the height of A is 20% less than the height of B.

Let the height of b is x. So, the height of A is

A=x-\frac{20}{100}\times x=x-0.2x=0.8xA=x−

100

20

×x=x−0.2x=0.8x

We have to find by how much per cent is B's height more than that of A.

\%=\frac{\text{Height of B-Height of A}}{\text{Height of A}}\times 100%=

Height of A

Height of B-Height of A

×100

\%=\frac{x-0.8x}{0.8x}\times 100%=

0.8x

x−0.8x

×100

\%=\frac{0.2x}{0.8x}\times 100%=

0.8x

0.2x

×100

\%=\frac{1}{4}\times 100%=

4

1

×100

\%=25%=25

Therefore the height of B is 25% more than A.